Warp stop-motion for looms.



S. B, CUTTING. WARP STOP MOTION FOR LOOMS.

APPLIOATION FILED NOV. 26, 1912. m1 $3 M Patented Mar. 30, 1915.

3 SHBETSFSHEET 1.

S. B. CUTTING.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED NOV. 26, 1912.

Patented Mar. 30, 1915. I

3 SHEETS-SHEBT 2.

S. B. CUTTING.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED NOV. 26, 1912.

.Patentetl Mar. 30, 19115.

3 SHEETS-SHEET 3.

W. 37 16 if WWW? AM y? if" amen/bore II t FUEL 1B. CUTTING, 01FBRIDGEPORT, CONNECTICUT, ASSIGNOR 1'0 THE SALTS '1 TILE NUFACTURING-COMPANY, OF BRIDGEPORT, CONNECTICUT, A. CORJPOi:

OF CONNECTICUT.

. which illustrate the application thereof to a pile fabric loom, itbeing understood, however, that the invention is capable of applicationto looms generally and is not confined to the particular loom shown.

In the drawings Figure 1 is a sectional view, partly diagrammatic, of apile fabric loom embodying the invention; Fig. 2, a similar view on anenlarged scale showing the circuit connections; Fig. 3, a rear elevationof the part on which the pile warps are supported at the point oflocation of the drop devices; Fig. 4, a section on the plane .of theline 44 of Fig. 3; Figs. 5, 6, and 7,

views of drop devices-which may be'employed; Fig. 8, a view of amodification which may be employed in the construction shown in Fig. 1;Fig. 9, a side View of means which may be used to prevent the dropsjumping off; and Figs. 10 and 11, views of drops which may be employedwith the preventing means of Fig. 9.

Similar reference numerals indicate similar parts in the several views.

Referring to the drawings, the numeral 1 designates the main warp beam;2, the main or back warps which pass over the whip roll 3; 1, the pilewarp beam; 5, the pile warps, and 6, the let-01f rolls for the latter.Both sets of 'warp threads are led through the usual harness mechanismindicated at 7 for the formation of the sheds, the pile warps beingcarried up through the lower set of back warps and let offintermittently to float between the two back warps in the usual andwell-known manner. The back warps carry metallic drops 8, and the pilewarps carry drops 9, these drops being adapted, when a warp threadbreaks. and by this is meant to include not only an actual severance ofthe warp, but any abnormal slackness thereof, to close a controllingcircuit 10 for the loom stop mechanism. The stopping mechanism may be ofHON WARP STOP-MOTION FOR LOOMS.

fipeciflcation of Letters Patent. Pmbmm'ib gd M 37119 119115 Applicationfiled November 26, 1912.

Serial No. 733,571.

any known type and, for the purpose of illustration, I have shown onecomprising anauxiliary knock-01f lever 11 which rests upon the mainknock-off lever 12', both of said levers being pivoted on a bracketextending from the breast beam 13. Secured to lever 11 is a bracketwhich carries an electromagnet 14 included in circuit 10. The armature15 of said magnet projects toward the lay 16 on which is fixed a hunter17. The magnet 14 is normally denergized so that its armature is out ofthe path of bunter 17 on the beat-up of the lay, but when a back warp ora pile warp breaks, the controlling circuit 10 will be closed, therebyenergizing said magnet and positioning its armature in the path of thebunter on the next beat-up of the lay. When the bunter strikes armature15, auxiliary lever 11 will be shifted and thus act on shipper lever 18to release it from its retaining shoulder to stop the loom.

To effect the closing of circuit 10 to energize magnet 14 for thepurpose above stated, I employ metallic drop devices adapted to contactwith the circuit terminals. form of drop shown in Figs. 1' and 2 on thepile warps isprovided with a closed slot 9 in the upper part thereof,and an openended slot 9 in the lower part thereof, the latter serving asa thread aperture. of similar form are shown supported upon the backwarps 2. The back warps are crossed over the usual lease rods and thetwo sets are separated by the upper and lower dividing rolls 19 and 20,respectively. In the arrangement shown, the pile warps 5 are led overthe lower dividing roll 20 through the space between the divided backwarps and over the easing rods 21, which rods are connected by springs22 to the head motion or harness levers 23.

One part of my invention relates to the manner of supporting the dropswhich, for convenience, I will explain in connection with the pile warpdrops 9. In U. S. Patent No. 1,019,026, granted March 5, 1912, the dropsare supported upon a short horizontal section of the pile warps formedby passing the latter over two rods placed in the same horizontal plane.This provision of a horizontal section of the pile warps, either in thearrangement shown in said patent or in U. S. Patent No. 635.637, datedOntnber 24, 1899. produces friction sufificient The Drops to throw offconsiderable lint from the loosely twisted yarn of which. the pile warpis made. This is because the pile warps are bent in their course, and toavoid this and thereby reduce the friction to a minimum, I pass the pilewarps over two rods 24 and 25 lying in different horizontal planesdirectly under a straight inclined section of the pile warps, so thatthe latter may extend in a substantially straight line. For convenienceI have shown the inclined section of the pile warp extending from thelet-0E roll to the easing rods. This, however, is not material to theinvention as in some looms it will be desirable to use intermediatelythe let-ofi' rolls and easing rods, rods for better guiding the pilewarp. Rods 24 and 25 may be placed at any convenient point between thelet-ofi rolls and the easing rods. I have shown them extending acrossthe l'oom in the space between the back warps and as supported in endpieces 26 constituting a frame which is suspended by rods 27 from thehead motion or harness levers 23. Supported in this frame is a compoundterminal comprising a bar 28 and a blade 29 set in the upper edgethereof, said bar and blade being insulated from each other andconnected to the respective terminals of circuit 10. The compoundterminal and drops may be vertical or inclined; I have shown them asinclined, and placed above the rods 24 and 25. The drops 9 are supportedon the short section of the pile warps between said rods, the bar 28passing through the slots 9' of the drops and serving as a guide for thedrops.

The compound terminal for the drops 8 of the back warps is similar tothat above described, but instead of mounting these terminals in amovable frame, they are secured in fixed supports on opposite sides ofthe loom frame.

During the normal running of the loom the drop devices on both the backwarps and the pile warps will be supported on the warp threads out ofcontact with the corresponding blade 29 of the compound terminal. When,however, either a back or a' pile warp breaks, the corresponding dropwill be released and, falling upon the blade 29, will close circuit 10,it being understood that 3 the drops are always in contact with bar 28of the terminal. The magnet 14 being thus energized the knock-0Emechanism will be set in operation to stop the loom.

I do not confine myself to the locationof the drops on the'pile warps inthe space between the back warps a sufficient distance, as shown in saidPatent No. 635,637, to permit the frame carrying the rods 24 and 25 andthe compound terminal to be placed above the back warps. Also, I do notlimit myself to the application of drop devices on an inclined sectionof pile warps as the of the straight run of the warps upon which tosupport the drops. Also, the tension is better regulated, andfurthermore, the slight up and down motion of the drop frame, because ofits support from the head motion or other moving part of the loom, tendsto throw off the lint and to prevent the accumulation of an undesirablequantity of lint.

As before stated, any suitable form of drop may be employed. Besides theform already described, I may use that shown in Fig. 5, having a closedslot in the upper part thereof, through which passes a guide 30, andlaterally projecting portions adapted, when the drop falls, to contactwith the circuit terminals placed outside of the body of the drop and inthe path of a falling drop.

In Fig. 6, the drop is closed at its lower part and provided with athread aperture 31. One of the circuit terminals, passing through theslot in the upper part of the drop, serves as a guide for the drop. Theother terminal is outside of the body of the drop and is engaged, whenthe drop falls, by a lateral projection, as shown.

In Fig. 7, I have shown a form of drop which may be pivoted upon one ofthe terminals 32, the other terminal 33 lying in the path of a fallingdrop. As in the other forms, this drop will be supported upon anunbroken warp thread and will be permitted to contact with terminal 33,only when the warp breaks or becomes unduly slack.

As shown in Figs. 1'4, two points of support, namely, the rods 24 and25, are shown for the warp threads. As the essential feature is to placethe drops in proximity to a supported section of the warps I may employthe construction shown in Fig. 8 in which a rod 3& is employed extendingbetween the end pieces 35, these latter also supporting two compoundterminals placed on opposite sides of the rod 3t, and inclined insubstantially parallel planes to the plane of the warps.

Another feature of my invention which I have illustrated separately inFigs. 9-11, in order to avoid confusion, relates to means for preventingthe drops jumping off or being thrown off the warps during the normalrunning of the loom. This means comprises a light wire 36 connected tosprings 37 and held between arms 38 adjustably connected to the bar 28of the compound terminal. The wire 36 is placed a sufficient distanceabove the upper ends of the drops as not to permit contact between thedrops and said wire due to the normal up and down movement of the dropswhile the loom is running, but will prevent the jumping off of the dropsshould there be an abnormal movement of the drops. llhe drops maybe ofthe form shown in Fig. 10, having -an open lower end'and a threadaperture 39, and a closed upper end. Or the form may be that shown in Fig. 11 of which the upper end of the drop is cut out at 40, as shown, sothatthe wire 36 will normally be at the upper end of the cut or slot. Bythis means any abnormal movement of the drops upward, which would tendto throw them completely off the warps, is prevented by the dropscontacting with the wire 36.

The arrangement of the wire 36, above described, permits the operator totake off and put on drops by pressing the'wire to one side. When thedrops are replaced and pressure on the wire removed, the latter willreturn to its original position over the dropspreventing them fromjumping off. While I have shown a wire 36, any metal or otherrestraining device may be employed.

I believe myself to be the first to apply a w'arp stop motion to a loomhaving the drop devicessupported on warp threads on an inclined sectionof said threads, and I therefore desire to claim the'same broadlywithout reference to the specific means or arrangement shown.

What I claim and desire to secure by Letters Patent of the UnitedStates 1. In a warp stop motion for pile fabric looms, the combinationof stopping mechanism and a controller therefor, a pile warp beam,easing rods over which the pile warps are led, drop devices carried bythe pile warps, said drops being supported upon a straight inclinedsection of the pile warps between the beam'and the easing rods and inthe space between the back warps, and adapted to set in motion saidcontroller when a pile warp thread breaks or becomes unduly slack.

2. In a warp'stop motion for pile fabric looms, the combination ofstopping mechanism and a controller therefor, a pile warp beam, easingrods over which the pile warps are led, drop devices carried by the pilewarps, said drops being supported upon a I straight inclined section ofthe pile warps between the beam and the easing rods and in the spacebetween the back warps, and adapted to set in motion said controllerwhen a pile warp thread breaks or becomes unduly slack, and means formoving the drop devices.

3. In a warp stop motiomfor looms the combination of stoppingmechanismand a controller therefor, a pile warp beam, easing rods overwhich the pile warps are led, a

frame between said beam and easing rods combination of stoppingmechanism and a controller therefor, pile warp let-0d rolls and easingrods, the said pile warps leading from said rolls tothe easing rods insub stantially straight lines, and drop devices supported on the pilewarps at some part of said straight section thereof and in the spacebetween the back warps, and adapted to set in operation said controllerwhen a warp thread breaks or becomes unduly slack.

5. In a warp stop motion for looms the combination of stopping mechanismand a controlling circuit therefor, let-ofi' rolls and easing rods,means for leading the pile warps from the let-off rolls in substantiallystraight lines to the easing rods, drop devices supported upon the pilewarps at an inclined section thereof between thew said rolls and theeasing rods and in the space between the back warp, said drops beingadapted to close the circuit when a pile warp breaks or becomes undulyslack.

6. In a warp stop motion for pile fabric looms, the combination ofstopping mechanism and a controlling circuit therefor, a rod or rods forsupporting the pile warps at a straight inclinedsection of the warps,means for supporting said rods from a moving part of the loom, dropdevices supported by unbroken pile warps in proximity to said rod orrods, said drops being adapted to set in operation said controller whena warp slack.

In testimony whereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

SAMlUlEL B. CUTTING.

Witnesses ARTHUR G. MEDOALF,

ARTHUR UAKLnr.

thread breaks or becomes unduly,

